...

app/src/main/java/com/base/scanqr/qr/CameraUtils.kt

@@ -6,15 +6,18 @@ import androidx.camera.core.Camera
 import androidx.camera.core.CameraSelector
 import androidx.camera.core.ImageAnalysis
 import androidx.camera.core.Preview
+import androidx.camera.core.ZoomState
 import androidx.camera.lifecycle.ProcessCameraProvider
 import androidx.camera.view.PreviewView
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.LiveData
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
 import kotlin.math.abs
 import kotlin.math.max
 import kotlin.math.min
 
+
 class CameraUtils(
     val activity: AppCompatActivity,
 ) {
@@ -27,6 +30,9 @@ class CameraUtils(
     private var cameraProvider: ProcessCameraProvider? = null
     private var imageAnalyzer: ImageAnalysis? = null
 
+    var cameraReadyCallBack: (() -> Unit)? = null
+
+
     init {
         cameraExecutor = Executors.newSingleThreadExecutor()
     }
@@ -97,6 +103,7 @@ class CameraUtils(
         } catch (exc: Exception) {
             exc.printStackTrace()
         }
+        cameraReadyCallBack?.invoke()
     }
 
     /**
@@ -142,6 +149,62 @@ class CameraUtils(
         return AspectRatio.RATIO_16_9
     }
 
+    /**
+     * 打开闪光灯
+     */
+    fun turnOnFlash() {
+        val cameraControl = camera?.cameraControl
+        cameraControl?.enableTorch(true)
+    }
+
+    /**
+     * 关闭闪光
+     */
+    fun turnOffFlash() {
+        val cameraControl = camera?.cameraControl
+        cameraControl?.enableTorch(false)
+    }
+
+    /**
+     * 获取闪光状态
+     */
+    fun getFlashState(): LiveData<Int>? {
+        return camera?.cameraInfo?.torchState
+    }
+
+    /**
+     * 是否支持变焦
+     */
+    fun isZoomSupported(): Boolean {
+        val zoomState: ZoomState? = camera?.cameraInfo?.zoomState?.getValue()
+        if (zoomState != null && !java.lang.Float.isNaN(zoomState.minZoomRatio) && !java.lang.Float.isNaN(zoomState.maxZoomRatio)) {
+            // 相机支持变焦
+            return true
+        }
+        return false
+    }
+
+    /**
+     * 获取变焦范围
+     */
+    fun getZoomRange(): Pair<Float, Float> {
+        val zoomState: ZoomState? = camera?.cameraInfo?.zoomState?.getValue()
+        if (zoomState != null) {
+            val minZoomRatio = zoomState.minZoomRatio
+            val maxZoomRatio = zoomState.maxZoomRatio
+            return Pair(minZoomRatio, maxZoomRatio)
+        }
+        return Pair(0f, 100f)
+    }
+
+    /**
+     * 设置变焦值
+     */
+    fun setZoomRate(ratio: Float) {
+        val cameraControl = camera?.cameraControl
+        cameraControl?.setZoomRatio(ratio)
+    }
+
     companion object {
         private const val RATIO_4_3_VALUE = 4.0 / 3.0
         private const val RATIO_16_9_VALUE = 16.0 / 9.0

app/src/main/java/com/base/scanqr/ui/main/MainActivity.kt

@@ -109,6 +109,11 @@ class MainActivity : BaseActivity<ActivityMainBinding>(ActivityMainBinding::infl
         naviFragment(this.id)
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        cameraUtils?.onDestroy()
+    }
+
     override fun configSystemBar() {
         super.configSystemBar()
         immersionBar {

app/src/main/java/com/base/scanqr/ui/main/ScanFragment.kt

@@ -2,9 +2,16 @@ package com.base.scanqr.ui.main
 
 import android.Manifest
 import android.content.pm.PackageManager
+import android.hardware.camera2.CameraMetadata.FLASH_MODE_OFF
+import android.view.View
+import android.widget.SeekBar
+import androidx.camera.core.ImageCapture.FLASH_MODE_ON
+import com.base.scanqr.R
 import com.base.scanqr.base.BaseFragment
 import com.base.scanqr.databinding.FragmentScanBinding
 import com.base.scanqr.qr.QRImageAnalyzer
+import com.base.scanqr.utils.IntentUtils.intentSafPickImage
+import com.base.scanqr.utils.LogEx
 import com.base.scanqr.utils.PermissionUtils.checkCameraPermission
 import com.gyf.immersionbar.ktx.immersionBar
 import java.util.concurrent.atomic.AtomicBoolean
@@ -13,6 +20,7 @@ import java.util.concurrent.atomic.AtomicBoolean
 class ScanFragment : BaseFragment<FragmentScanBinding>(FragmentScanBinding::inflate) {
 
 
+    private var zoomPair = Pair(0f, 100f)
     override fun initView() {
         super.initView()
     }
@@ -33,10 +41,42 @@ class ScanFragment : BaseFragment<FragmentScanBinding>(FragmentScanBinding::infl
     private fun initCamera() {
         if (cameraInit.get()) return
         val hasFlash = requireContext().packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)
+        if (!hasFlash) {
+            binding.flFlash.visibility = View.GONE
+        }
         val qrImageAnalyzer = QRImageAnalyzer()
         val activity = requireActivity() as MainActivity?
         activity ?: return
         activity.cameraUtils?.startBind(binding.previewView, qrImageAnalyzer)
+
+        activity.cameraUtils?.cameraReadyCallBack = {
+
+            //变焦
+            if (activity.cameraUtils?.isZoomSupported() != true) {
+                binding.llZoom.visibility = View.GONE
+            } else {
+                zoomPair = activity.cameraUtils?.getZoomRange() ?: Pair(0f, 100f)
+                LogEx.logDebug(TAG, "zoomPair=${zoomPair.first} ${zoomPair.second}")
+                binding.seekbar.max = ((zoomPair.second - zoomPair.first) * 10).toInt()
+            }
+
+            //闪光灯
+            activity.cameraUtils?.getFlashState()?.observe(this) { state ->
+                if (state == FLASH_MODE_OFF) {
+                    binding.ivFlash.setImageResource(R.mipmap.shnadian_on)
+                    binding.flFlash.setOnClickListener {
+                        activity.cameraUtils?.turnOnFlash()
+                    }
+                }
+                if (state == FLASH_MODE_ON) {
+                    binding.ivFlash.setImageResource(R.mipmap.shandian_off)
+                    binding.flFlash.setOnClickListener {
+                        activity.cameraUtils?.turnOffFlash()
+                    }
+                }
+            }
+        }
+
         cameraInit.set(true)
     }
 
@@ -54,6 +94,42 @@ class ScanFragment : BaseFragment<FragmentScanBinding>(FragmentScanBinding::infl
 
     override fun initListener() {
         super.initListener()
+        binding.flImage.setOnClickListener {
+            val activity = requireActivity() as MainActivity?
+            val intent = intentSafPickImage()
+            activity?.launcher?.launch(intent)
+        }
+        binding.flFlash.setOnClickListener {
+            val activity = requireActivity() as MainActivity?
+            activity?.cameraUtils?.turnOnFlash()
+        }
+        binding.seekbar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+                if (fromUser) {
+                    val zoom = (zoomPair.first + seekBar.progress / 10f)
+                    val activity = requireActivity() as MainActivity?
+                    activity?.cameraUtils?.setZoomRate(zoom)
+                }
+            }
+
+            override fun onStartTrackingTouch(seekBar: SeekBar) {
+            }
+
+            override fun onStopTrackingTouch(seekBar: SeekBar) {
+
+            }
+        })
+        binding.flReduce.setOnClickListener {
+            val activity = requireActivity() as MainActivity?
+            activity?.cameraUtils?.setZoomRate(zoomPair.first)
+            binding.seekbar.progress = 0
+        }
+        binding.flAdd.setOnClickListener {
+            val activity = requireActivity() as MainActivity?
+            activity?.cameraUtils?.setZoomRate(zoomPair.second)
+            binding.seekbar.progress = binding.seekbar.max
+        }
+
     }
 
 

app/src/main/java/com/base/scanqr/utils/IntentUtils.kt

@@ -43,7 +43,7 @@ object IntentUtils {
         return Intent()
     }
 
-    fun intentShareText( text: String): Intent {
+    fun intentShareText(text: String): Intent {
         val sendIntent = Intent()
         sendIntent.action = Intent.ACTION_SEND
         sendIntent.putExtra(Intent.EXTRA_TEXT, text) // 添加要分享的文本
@@ -53,4 +53,12 @@ object IntentUtils {
         val shareIntent = Intent.createChooser(sendIntent, null)
         return shareIntent
     }
+
+
+    fun intentSafPickImage(): Intent {
+        val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.setType("image/*")
+        return intent
+    }
 }
\ No newline at end of file

app/src/main/res/layout/fragment_scan.xml

@@ -28,6 +28,7 @@
 
 
     <LinearLayout
+        android:id="@+id/ll_zoom"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginHorizontal="16dp"
@@ -39,7 +40,7 @@
         app:layout_constraintStart_toStartOf="parent">
 
         <FrameLayout
-            android:id="@+id/flAdd"
+            android:id="@+id/flReduce"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
@@ -53,12 +54,13 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
-                android:src="@mipmap/jia"
+                android:src="@mipmap/jian"
                 tools:ignore="ContentDescription" />
 
         </FrameLayout>
 
         <androidx.appcompat.widget.AppCompatSeekBar
+            android:id="@+id/seekbar"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
@@ -70,7 +72,7 @@
             tools:progress="50" />
 
         <FrameLayout
-            android:id="@+id/flReduce"
+            android:id="@+id/flAdd"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
@@ -84,11 +86,12 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
-                android:src="@mipmap/jian"
+                android:src="@mipmap/jia"
                 tools:ignore="ContentDescription" />
 
         </FrameLayout>
 
+
     </LinearLayout>
 
     <LinearLayout
@@ -103,6 +106,7 @@
         app:layout_constraintStart_toStartOf="parent">
 
         <FrameLayout
+            android:id="@+id/fl_image"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:paddingHorizontal="16dp"
@@ -117,16 +121,18 @@
         </FrameLayout>
 
         <FrameLayout
+            android:id="@+id/fl_flash"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:paddingHorizontal="16dp"
             android:paddingVertical="10dp">
 
             <ImageView
+                android:id="@+id/iv_flash"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
-                android:src="@mipmap/shandian"
+                android:src="@mipmap/shandian_off"
                 tools:ignore="ContentDescription" />
         </FrameLayout>